204512421234 has 32 divisors (see below), whose sum is σ = 446332804416. Its totient is φ = 61956254720.

The previous prime is 204512421233. The next prime is 204512421257. The reversal of 204512421234 is 432124215402.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (204512421233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189627 + ... + 667070.

It is an arithmetic number, because the mean of its divisors is an integer number (13947900138).

Almost surely, 2^204512421234 is an apocalyptic number.

204512421234 is an abundant number, since it is smaller than the sum of its proper divisors (241820383182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204512421234 is a wasteful number, since it uses less digits than its factorization.

204512421234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860330.

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 204512421234 its reverse (432124215402), we get a palindrome (636636636636).

The spelling of 204512421234 in words is "two hundred four billion, five hundred twelve million, four hundred twenty-one thousand, two hundred thirty-four".